"sudo" command passwd is not canceled since i modify the follows files.
/usr/share/polkit-1/actions/ and /etc/pam.d/
the /etc/sudoers file have modified with no required passwd.
help me! thanks.

I do not understand what you are asking. Are you saying that it is
not requiring a password now? The default password timeout is 15
minutes.
Use 'sudo -k' to revoke your permissions.
use 'sudo -l' to list information about what you are allowed. This
will display any NOPASSWD flags set in the file.
Bob

sorry, bad with my EN.
"sudo" command passwd is required now .

i added the NOPASSWD field to sudoers file, and the "sudo" command all
ways was not required passwd.
But now, i modify these files under /usr/share/polkit-1/actions/, and it
is is required passwd.